class_docstr: Class used to plot points in the Poincare polydisk.
docstr: Define the ax parameters.
docstr_tok: ["Define","the","ax","parameters","."]
code: def set_ax(ax=None):
      """Define the ax parameters."""
      if ax is None:
          ax = plt.subplot()
      ax_s = AX_SCALE
      plt.setp(
          ax,
          xlim=(-ax_s, ax_s),
          ylim=(-ax_s, ax_s),
          xlabel="X",
          ylabel="Y",
      )
      return ax
  
file_path: geomstats/geomstats/visualization/poincare_polydisk.py
imports: import matplotlib.pyplot
  from mpl_toolkits.mplot3d import Axes3D
  import geomstats.backend
label_desc: Use image node_id 2 for calling the PoincarePolyDisk obj's underlying member method code with example usage: obj.set_ax(ax) and returns: ax